| 30/10/19 | CF Pachuca [U20] | - | CF Monterrey [U20] | 2:3 |  |
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| 03/11/21 | CF Pachuca [U20] | - | Atlético San Luis [U20] | 1:3 |
| 30/10/19 | CF Pachuca [U20] | - | CF Monterrey [U20] | 2:3 | |
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| 03/11/21 | CF Pachuca [U20] | - | Atlético San Luis [U20] | 1:3 |
| William Sergio Mejía Castillo | |
| Born: | 21.04.1999 |
| Place of birth: |
Monterrey, 
Mexico |
| Nationality: |
Mexico
|
| Height: | 183 cm |
| Weight: | 84 kg |
| Position(s): | Defensive Midfielder Central Midfielder |
| Foot: | right |